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bd6ca2cf MH |
1 | /* |
2 | * max8997.c - Regulator driver for the Maxim 8997/8966 | |
3 | * | |
4 | * Copyright (C) 2011 Samsung Electronics | |
5 | * MyungJoo Ham <myungjoo.ham@smasung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * This driver is based on max8998.c | |
22 | */ | |
23 | ||
24 | #include <linux/bug.h> | |
bd6ca2cf MH |
25 | #include <linux/err.h> |
26 | #include <linux/gpio.h> | |
77b71b37 | 27 | #include <linux/of_gpio.h> |
bd6ca2cf | 28 | #include <linux/slab.h> |
65602c32 | 29 | #include <linux/module.h> |
bd6ca2cf MH |
30 | #include <linux/platform_device.h> |
31 | #include <linux/regulator/driver.h> | |
32 | #include <linux/regulator/machine.h> | |
33 | #include <linux/mfd/max8997.h> | |
34 | #include <linux/mfd/max8997-private.h> | |
77b71b37 | 35 | #include <linux/regulator/of_regulator.h> |
bd6ca2cf MH |
36 | |
37 | struct max8997_data { | |
38 | struct device *dev; | |
39 | struct max8997_dev *iodev; | |
40 | int num_regulators; | |
bd6ca2cf MH |
41 | int ramp_delay; /* in mV/us */ |
42 | ||
6e0414a5 MH |
43 | bool buck1_gpiodvs; |
44 | bool buck2_gpiodvs; | |
45 | bool buck5_gpiodvs; | |
bd6ca2cf MH |
46 | u8 buck1_vol[8]; |
47 | u8 buck2_vol[8]; | |
48 | u8 buck5_vol[8]; | |
6e0414a5 | 49 | int buck125_gpios[3]; |
bd6ca2cf | 50 | int buck125_gpioindex; |
6e0414a5 | 51 | bool ignore_gpiodvs_side_effect; |
bd6ca2cf MH |
52 | |
53 | u8 saved_states[MAX8997_REG_MAX]; | |
54 | }; | |
55 | ||
b79ca051 AL |
56 | static const unsigned int safeoutvolt[] = { |
57 | 4850000, | |
58 | 4900000, | |
59 | 4950000, | |
60 | 3300000, | |
61 | }; | |
62 | ||
bd6ca2cf MH |
63 | static inline void max8997_set_gpio(struct max8997_data *max8997) |
64 | { | |
bd6ca2cf MH |
65 | int set3 = (max8997->buck125_gpioindex) & 0x1; |
66 | int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1; | |
67 | int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1; | |
68 | ||
6e0414a5 MH |
69 | gpio_set_value(max8997->buck125_gpios[0], set1); |
70 | gpio_set_value(max8997->buck125_gpios[1], set2); | |
71 | gpio_set_value(max8997->buck125_gpios[2], set3); | |
bd6ca2cf MH |
72 | } |
73 | ||
74 | struct voltage_map_desc { | |
75 | int min; | |
76 | int max; | |
77 | int step; | |
bd6ca2cf MH |
78 | }; |
79 | ||
bc3b7756 | 80 | /* Voltage maps in uV */ |
bd6ca2cf | 81 | static const struct voltage_map_desc ldo_voltage_map_desc = { |
bc3b7756 | 82 | .min = 800000, .max = 3950000, .step = 50000, |
bd6ca2cf MH |
83 | }; /* LDO1 ~ 18, 21 all */ |
84 | ||
85 | static const struct voltage_map_desc buck1245_voltage_map_desc = { | |
bc3b7756 | 86 | .min = 650000, .max = 2225000, .step = 25000, |
bd6ca2cf MH |
87 | }; /* Buck1, 2, 4, 5 */ |
88 | ||
89 | static const struct voltage_map_desc buck37_voltage_map_desc = { | |
bc3b7756 | 90 | .min = 750000, .max = 3900000, .step = 50000, |
bd6ca2cf MH |
91 | }; /* Buck3, 7 */ |
92 | ||
bc3b7756 | 93 | /* current map in uA */ |
bd6ca2cf | 94 | static const struct voltage_map_desc charger_current_map_desc = { |
bc3b7756 | 95 | .min = 200000, .max = 950000, .step = 50000, |
bd6ca2cf MH |
96 | }; |
97 | ||
98 | static const struct voltage_map_desc topoff_current_map_desc = { | |
bc3b7756 | 99 | .min = 50000, .max = 200000, .step = 10000, |
bd6ca2cf MH |
100 | }; |
101 | ||
102 | static const struct voltage_map_desc *reg_voltage_map[] = { | |
103 | [MAX8997_LDO1] = &ldo_voltage_map_desc, | |
104 | [MAX8997_LDO2] = &ldo_voltage_map_desc, | |
105 | [MAX8997_LDO3] = &ldo_voltage_map_desc, | |
106 | [MAX8997_LDO4] = &ldo_voltage_map_desc, | |
107 | [MAX8997_LDO5] = &ldo_voltage_map_desc, | |
108 | [MAX8997_LDO6] = &ldo_voltage_map_desc, | |
109 | [MAX8997_LDO7] = &ldo_voltage_map_desc, | |
110 | [MAX8997_LDO8] = &ldo_voltage_map_desc, | |
111 | [MAX8997_LDO9] = &ldo_voltage_map_desc, | |
112 | [MAX8997_LDO10] = &ldo_voltage_map_desc, | |
113 | [MAX8997_LDO11] = &ldo_voltage_map_desc, | |
114 | [MAX8997_LDO12] = &ldo_voltage_map_desc, | |
115 | [MAX8997_LDO13] = &ldo_voltage_map_desc, | |
116 | [MAX8997_LDO14] = &ldo_voltage_map_desc, | |
117 | [MAX8997_LDO15] = &ldo_voltage_map_desc, | |
118 | [MAX8997_LDO16] = &ldo_voltage_map_desc, | |
119 | [MAX8997_LDO17] = &ldo_voltage_map_desc, | |
120 | [MAX8997_LDO18] = &ldo_voltage_map_desc, | |
121 | [MAX8997_LDO21] = &ldo_voltage_map_desc, | |
122 | [MAX8997_BUCK1] = &buck1245_voltage_map_desc, | |
123 | [MAX8997_BUCK2] = &buck1245_voltage_map_desc, | |
124 | [MAX8997_BUCK3] = &buck37_voltage_map_desc, | |
125 | [MAX8997_BUCK4] = &buck1245_voltage_map_desc, | |
126 | [MAX8997_BUCK5] = &buck1245_voltage_map_desc, | |
127 | [MAX8997_BUCK6] = NULL, | |
128 | [MAX8997_BUCK7] = &buck37_voltage_map_desc, | |
129 | [MAX8997_EN32KHZ_AP] = NULL, | |
130 | [MAX8997_EN32KHZ_CP] = NULL, | |
131 | [MAX8997_ENVICHG] = NULL, | |
132 | [MAX8997_ESAFEOUT1] = NULL, | |
133 | [MAX8997_ESAFEOUT2] = NULL, | |
134 | [MAX8997_CHARGER_CV] = NULL, | |
135 | [MAX8997_CHARGER] = &charger_current_map_desc, | |
136 | [MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc, | |
137 | }; | |
138 | ||
bd6ca2cf MH |
139 | static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev, |
140 | unsigned int selector) | |
141 | { | |
b3e1348e | 142 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
143 | |
144 | if (rid != MAX8997_CHARGER_CV) | |
145 | goto err; | |
146 | ||
147 | switch (selector) { | |
148 | case 0x00: | |
149 | return 4200000; | |
150 | case 0x01 ... 0x0E: | |
151 | return 4000000 + 20000 * (selector - 0x01); | |
152 | case 0x0F: | |
153 | return 4350000; | |
154 | default: | |
155 | return -EINVAL; | |
156 | } | |
157 | err: | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | static int max8997_list_voltage(struct regulator_dev *rdev, | |
162 | unsigned int selector) | |
163 | { | |
164 | const struct voltage_map_desc *desc; | |
b3e1348e | 165 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
166 | int val; |
167 | ||
168 | if (rid >= ARRAY_SIZE(reg_voltage_map) || | |
169 | rid < 0) | |
170 | return -EINVAL; | |
171 | ||
172 | desc = reg_voltage_map[rid]; | |
173 | if (desc == NULL) | |
174 | return -EINVAL; | |
175 | ||
176 | val = desc->min + desc->step * selector; | |
177 | if (val > desc->max) | |
178 | return -EINVAL; | |
179 | ||
bc3b7756 | 180 | return val; |
bd6ca2cf MH |
181 | } |
182 | ||
183 | static int max8997_get_enable_register(struct regulator_dev *rdev, | |
184 | int *reg, int *mask, int *pattern) | |
185 | { | |
b3e1348e | 186 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
187 | |
188 | switch (rid) { | |
189 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
190 | *reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
191 | *mask = 0xC0; | |
192 | *pattern = 0xC0; | |
193 | break; | |
194 | case MAX8997_BUCK1: | |
195 | *reg = MAX8997_REG_BUCK1CTRL; | |
196 | *mask = 0x01; | |
197 | *pattern = 0x01; | |
198 | break; | |
199 | case MAX8997_BUCK2: | |
200 | *reg = MAX8997_REG_BUCK2CTRL; | |
201 | *mask = 0x01; | |
202 | *pattern = 0x01; | |
203 | break; | |
204 | case MAX8997_BUCK3: | |
205 | *reg = MAX8997_REG_BUCK3CTRL; | |
206 | *mask = 0x01; | |
207 | *pattern = 0x01; | |
208 | break; | |
209 | case MAX8997_BUCK4: | |
210 | *reg = MAX8997_REG_BUCK4CTRL; | |
211 | *mask = 0x01; | |
212 | *pattern = 0x01; | |
213 | break; | |
214 | case MAX8997_BUCK5: | |
215 | *reg = MAX8997_REG_BUCK5CTRL; | |
216 | *mask = 0x01; | |
217 | *pattern = 0x01; | |
218 | break; | |
219 | case MAX8997_BUCK6: | |
220 | *reg = MAX8997_REG_BUCK6CTRL; | |
221 | *mask = 0x01; | |
222 | *pattern = 0x01; | |
223 | break; | |
224 | case MAX8997_BUCK7: | |
225 | *reg = MAX8997_REG_BUCK7CTRL; | |
226 | *mask = 0x01; | |
227 | *pattern = 0x01; | |
228 | break; | |
229 | case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP: | |
230 | *reg = MAX8997_REG_MAINCON1; | |
231 | *mask = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
232 | *pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP); | |
233 | break; | |
234 | case MAX8997_ENVICHG: | |
235 | *reg = MAX8997_REG_MBCCTRL1; | |
236 | *mask = 0x80; | |
237 | *pattern = 0x80; | |
238 | break; | |
239 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
240 | *reg = MAX8997_REG_SAFEOUTCTRL; | |
241 | *mask = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
242 | *pattern = 0x40 << (rid - MAX8997_ESAFEOUT1); | |
243 | break; | |
244 | case MAX8997_CHARGER: | |
245 | *reg = MAX8997_REG_MBCCTRL2; | |
246 | *mask = 0x40; | |
247 | *pattern = 0x40; | |
248 | break; | |
249 | default: | |
250 | /* Not controllable or not exists */ | |
251 | return -EINVAL; | |
bd6ca2cf MH |
252 | } |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | static int max8997_reg_is_enabled(struct regulator_dev *rdev) | |
258 | { | |
259 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
260 | struct i2c_client *i2c = max8997->iodev->i2c; | |
261 | int ret, reg, mask, pattern; | |
262 | u8 val; | |
263 | ||
264 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
c245c087 | 265 | if (ret) |
bd6ca2cf MH |
266 | return ret; |
267 | ||
268 | ret = max8997_read_reg(i2c, reg, &val); | |
269 | if (ret) | |
270 | return ret; | |
271 | ||
272 | return (val & mask) == pattern; | |
273 | } | |
274 | ||
275 | static int max8997_reg_enable(struct regulator_dev *rdev) | |
276 | { | |
277 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
278 | struct i2c_client *i2c = max8997->iodev->i2c; | |
279 | int ret, reg, mask, pattern; | |
280 | ||
281 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
282 | if (ret) | |
283 | return ret; | |
284 | ||
285 | return max8997_update_reg(i2c, reg, pattern, mask); | |
286 | } | |
287 | ||
288 | static int max8997_reg_disable(struct regulator_dev *rdev) | |
289 | { | |
290 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
291 | struct i2c_client *i2c = max8997->iodev->i2c; | |
292 | int ret, reg, mask, pattern; | |
293 | ||
294 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
295 | if (ret) | |
296 | return ret; | |
297 | ||
298 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
299 | } | |
300 | ||
301 | static int max8997_get_voltage_register(struct regulator_dev *rdev, | |
302 | int *_reg, int *_shift, int *_mask) | |
303 | { | |
6f43c380 | 304 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); |
b3e1348e | 305 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
306 | int reg, shift = 0, mask = 0x3f; |
307 | ||
308 | switch (rid) { | |
309 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
310 | reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1); | |
311 | break; | |
312 | case MAX8997_BUCK1: | |
313 | reg = MAX8997_REG_BUCK1DVS1; | |
6f43c380 AL |
314 | if (max8997->buck1_gpiodvs) |
315 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
316 | break; |
317 | case MAX8997_BUCK2: | |
318 | reg = MAX8997_REG_BUCK2DVS1; | |
6f43c380 AL |
319 | if (max8997->buck2_gpiodvs) |
320 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
321 | break; |
322 | case MAX8997_BUCK3: | |
323 | reg = MAX8997_REG_BUCK3DVS; | |
324 | break; | |
325 | case MAX8997_BUCK4: | |
326 | reg = MAX8997_REG_BUCK4DVS; | |
327 | break; | |
328 | case MAX8997_BUCK5: | |
329 | reg = MAX8997_REG_BUCK5DVS1; | |
6f43c380 AL |
330 | if (max8997->buck5_gpiodvs) |
331 | reg += max8997->buck125_gpioindex; | |
bd6ca2cf MH |
332 | break; |
333 | case MAX8997_BUCK7: | |
334 | reg = MAX8997_REG_BUCK7DVS; | |
335 | break; | |
336 | case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2: | |
337 | reg = MAX8997_REG_SAFEOUTCTRL; | |
338 | shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0; | |
339 | mask = 0x3; | |
340 | break; | |
341 | case MAX8997_CHARGER_CV: | |
342 | reg = MAX8997_REG_MBCCTRL3; | |
343 | shift = 0; | |
344 | mask = 0xf; | |
345 | break; | |
346 | case MAX8997_CHARGER: | |
347 | reg = MAX8997_REG_MBCCTRL4; | |
348 | shift = 0; | |
349 | mask = 0xf; | |
350 | break; | |
351 | case MAX8997_CHARGER_TOPOFF: | |
352 | reg = MAX8997_REG_MBCCTRL5; | |
353 | shift = 0; | |
354 | mask = 0xf; | |
355 | break; | |
356 | default: | |
357 | return -EINVAL; | |
358 | } | |
359 | ||
360 | *_reg = reg; | |
361 | *_shift = shift; | |
362 | *_mask = mask; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
9e96b3a7 | 367 | static int max8997_get_voltage_sel(struct regulator_dev *rdev) |
bd6ca2cf MH |
368 | { |
369 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
bd6ca2cf MH |
370 | struct i2c_client *i2c = max8997->iodev->i2c; |
371 | int reg, shift, mask, ret; | |
bd6ca2cf MH |
372 | u8 val; |
373 | ||
374 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
375 | if (ret) | |
376 | return ret; | |
377 | ||
bd6ca2cf MH |
378 | ret = max8997_read_reg(i2c, reg, &val); |
379 | if (ret) | |
380 | return ret; | |
381 | ||
382 | val >>= shift; | |
383 | val &= mask; | |
384 | ||
9e96b3a7 | 385 | return val; |
bd6ca2cf MH |
386 | } |
387 | ||
388 | static inline int max8997_get_voltage_proper_val( | |
389 | const struct voltage_map_desc *desc, | |
390 | int min_vol, int max_vol) | |
391 | { | |
2358b776 | 392 | int i; |
bd6ca2cf MH |
393 | |
394 | if (desc == NULL) | |
395 | return -EINVAL; | |
396 | ||
397 | if (max_vol < desc->min || min_vol > desc->max) | |
398 | return -EINVAL; | |
399 | ||
2358b776 AL |
400 | if (min_vol < desc->min) |
401 | min_vol = desc->min; | |
bd6ca2cf | 402 | |
2358b776 | 403 | i = DIV_ROUND_UP(min_vol - desc->min, desc->step); |
bd6ca2cf | 404 | |
bd6ca2cf | 405 | if (desc->min + desc->step * i > max_vol) |
bd6ca2cf MH |
406 | return -EINVAL; |
407 | ||
408 | return i; | |
409 | } | |
410 | ||
411 | static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev, | |
412 | int min_uV, int max_uV, unsigned *selector) | |
413 | { | |
414 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
415 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 416 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
417 | int lb, ub; |
418 | int reg, shift = 0, mask, ret = 0; | |
419 | u8 val = 0x0; | |
420 | ||
421 | if (rid != MAX8997_CHARGER_CV) | |
422 | return -EINVAL; | |
423 | ||
424 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
425 | if (ret) | |
426 | return ret; | |
427 | ||
428 | if (max_uV < 4000000 || min_uV > 4350000) | |
429 | return -EINVAL; | |
430 | ||
431 | if (min_uV <= 4000000) { | |
432 | if (max_uV >= 4000000) | |
433 | return -EINVAL; | |
434 | else | |
435 | val = 0x1; | |
436 | } else if (min_uV <= 4200000 && max_uV >= 4200000) | |
437 | val = 0x0; | |
438 | else { | |
439 | lb = (min_uV - 4000001) / 20000 + 2; | |
440 | ub = (max_uV - 4000000) / 20000 + 1; | |
441 | ||
442 | if (lb > ub) | |
443 | return -EINVAL; | |
444 | ||
445 | if (lb < 0xf) | |
446 | val = lb; | |
447 | else { | |
448 | if (ub >= 0xf) | |
449 | val = 0xf; | |
450 | else | |
451 | return -EINVAL; | |
452 | } | |
453 | } | |
454 | ||
455 | *selector = val; | |
456 | ||
457 | ret = max8997_update_reg(i2c, reg, val << shift, mask); | |
458 | ||
459 | return ret; | |
460 | } | |
461 | ||
462 | /* | |
463 | * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF | |
464 | * BUCK1, 2, and 5 are available if they are not controlled by gpio | |
465 | */ | |
466 | static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, | |
467 | int min_uV, int max_uV, unsigned *selector) | |
468 | { | |
469 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
470 | struct i2c_client *i2c = max8997->iodev->i2c; | |
bd6ca2cf | 471 | const struct voltage_map_desc *desc; |
b3e1348e | 472 | int rid = rdev_get_id(rdev); |
62bc4d4a | 473 | int i, reg, shift, mask, ret; |
bd6ca2cf MH |
474 | |
475 | switch (rid) { | |
476 | case MAX8997_LDO1 ... MAX8997_LDO21: | |
477 | break; | |
478 | case MAX8997_BUCK1 ... MAX8997_BUCK5: | |
479 | break; | |
480 | case MAX8997_BUCK6: | |
481 | return -EINVAL; | |
482 | case MAX8997_BUCK7: | |
483 | break; | |
484 | case MAX8997_CHARGER: | |
485 | break; | |
486 | case MAX8997_CHARGER_TOPOFF: | |
487 | break; | |
488 | default: | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
492 | desc = reg_voltage_map[rid]; | |
493 | ||
bc3b7756 | 494 | i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
bd6ca2cf MH |
495 | if (i < 0) |
496 | return i; | |
497 | ||
498 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); | |
499 | if (ret) | |
500 | return ret; | |
501 | ||
bd6ca2cf MH |
502 | ret = max8997_update_reg(i2c, reg, i << shift, mask << shift); |
503 | *selector = i; | |
504 | ||
62bc4d4a AL |
505 | return ret; |
506 | } | |
507 | ||
24bd4109 | 508 | static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev, |
62bc4d4a AL |
509 | unsigned int old_selector, |
510 | unsigned int new_selector) | |
511 | { | |
512 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
513 | int rid = rdev_get_id(rdev); | |
514 | const struct voltage_map_desc *desc = reg_voltage_map[rid]; | |
515 | ||
516 | /* Delay is required only if the voltage is increasing */ | |
517 | if (old_selector >= new_selector) | |
518 | return 0; | |
519 | ||
520 | /* No need to delay if gpio_dvs_mode */ | |
521 | switch (rid) { | |
522 | case MAX8997_BUCK1: | |
523 | if (max8997->buck1_gpiodvs) | |
524 | return 0; | |
525 | break; | |
526 | case MAX8997_BUCK2: | |
527 | if (max8997->buck2_gpiodvs) | |
528 | return 0; | |
529 | break; | |
530 | case MAX8997_BUCK5: | |
531 | if (max8997->buck5_gpiodvs) | |
532 | return 0; | |
533 | break; | |
bd6ca2cf MH |
534 | } |
535 | ||
62bc4d4a AL |
536 | switch (rid) { |
537 | case MAX8997_BUCK1: | |
538 | case MAX8997_BUCK2: | |
539 | case MAX8997_BUCK4: | |
540 | case MAX8997_BUCK5: | |
541 | return DIV_ROUND_UP(desc->step * (new_selector - old_selector), | |
bc3b7756 | 542 | max8997->ramp_delay * 1000); |
bd6ca2cf MH |
543 | } |
544 | ||
62bc4d4a | 545 | return 0; |
bd6ca2cf MH |
546 | } |
547 | ||
548 | /* | |
549 | * Assess the damage on the voltage setting of BUCK1,2,5 by the change. | |
550 | * | |
551 | * When GPIO-DVS mode is used for multiple bucks, changing the voltage value | |
552 | * of one of the bucks may affect that of another buck, which is the side | |
553 | * effect of the change (set_voltage). This function examines the GPIO-DVS | |
554 | * configurations and checks whether such side-effect exists. | |
555 | */ | |
556 | static int max8997_assess_side_effect(struct regulator_dev *rdev, | |
557 | u8 new_val, int *best) | |
558 | { | |
559 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 560 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
561 | u8 *buckx_val[3]; |
562 | bool buckx_gpiodvs[3]; | |
563 | int side_effect[8]; | |
564 | int min_side_effect = INT_MAX; | |
565 | int i; | |
566 | ||
567 | *best = -1; | |
568 | ||
569 | switch (rid) { | |
570 | case MAX8997_BUCK1: | |
571 | rid = 0; | |
572 | break; | |
573 | case MAX8997_BUCK2: | |
574 | rid = 1; | |
575 | break; | |
576 | case MAX8997_BUCK5: | |
577 | rid = 2; | |
578 | break; | |
579 | default: | |
580 | return -EINVAL; | |
581 | } | |
582 | ||
583 | buckx_val[0] = max8997->buck1_vol; | |
584 | buckx_val[1] = max8997->buck2_vol; | |
585 | buckx_val[2] = max8997->buck5_vol; | |
6e0414a5 MH |
586 | buckx_gpiodvs[0] = max8997->buck1_gpiodvs; |
587 | buckx_gpiodvs[1] = max8997->buck2_gpiodvs; | |
588 | buckx_gpiodvs[2] = max8997->buck5_gpiodvs; | |
bd6ca2cf MH |
589 | |
590 | for (i = 0; i < 8; i++) { | |
591 | int others; | |
592 | ||
593 | if (new_val != (buckx_val[rid])[i]) { | |
594 | side_effect[i] = -1; | |
595 | continue; | |
596 | } | |
597 | ||
598 | side_effect[i] = 0; | |
599 | for (others = 0; others < 3; others++) { | |
600 | int diff; | |
601 | ||
602 | if (others == rid) | |
603 | continue; | |
604 | if (buckx_gpiodvs[others] == false) | |
605 | continue; /* Not affected */ | |
606 | diff = (buckx_val[others])[i] - | |
607 | (buckx_val[others])[max8997->buck125_gpioindex]; | |
608 | if (diff > 0) | |
609 | side_effect[i] += diff; | |
610 | else if (diff < 0) | |
611 | side_effect[i] -= diff; | |
612 | } | |
613 | if (side_effect[i] == 0) { | |
614 | *best = i; | |
615 | return 0; /* NO SIDE EFFECT! Use This! */ | |
616 | } | |
617 | if (side_effect[i] < min_side_effect) { | |
618 | min_side_effect = side_effect[i]; | |
619 | *best = i; | |
620 | } | |
621 | } | |
622 | ||
623 | if (*best == -1) | |
624 | return -EINVAL; | |
625 | ||
626 | return side_effect[*best]; | |
627 | } | |
628 | ||
629 | /* | |
630 | * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls | |
631 | * max8997_set_voltage_ldobuck to do the job. | |
632 | */ | |
633 | static int max8997_set_voltage_buck(struct regulator_dev *rdev, | |
634 | int min_uV, int max_uV, unsigned *selector) | |
635 | { | |
636 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
b3e1348e | 637 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
638 | const struct voltage_map_desc *desc; |
639 | int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; | |
640 | bool gpio_dvs_mode = false; | |
bd6ca2cf MH |
641 | |
642 | if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) | |
643 | return -EINVAL; | |
644 | ||
645 | switch (rid) { | |
646 | case MAX8997_BUCK1: | |
6e0414a5 | 647 | if (max8997->buck1_gpiodvs) |
bd6ca2cf MH |
648 | gpio_dvs_mode = true; |
649 | break; | |
650 | case MAX8997_BUCK2: | |
6e0414a5 | 651 | if (max8997->buck2_gpiodvs) |
bd6ca2cf MH |
652 | gpio_dvs_mode = true; |
653 | break; | |
654 | case MAX8997_BUCK5: | |
6e0414a5 | 655 | if (max8997->buck5_gpiodvs) |
bd6ca2cf MH |
656 | gpio_dvs_mode = true; |
657 | break; | |
658 | } | |
659 | ||
660 | if (!gpio_dvs_mode) | |
661 | return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV, | |
662 | selector); | |
663 | ||
664 | desc = reg_voltage_map[rid]; | |
bc3b7756 | 665 | new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV); |
bd6ca2cf MH |
666 | if (new_val < 0) |
667 | return new_val; | |
668 | ||
669 | tmp_dmg = INT_MAX; | |
670 | tmp_idx = -1; | |
671 | tmp_val = -1; | |
672 | do { | |
673 | damage = max8997_assess_side_effect(rdev, new_val, &new_idx); | |
674 | if (damage == 0) | |
675 | goto out; | |
676 | ||
677 | if (tmp_dmg > damage) { | |
678 | tmp_idx = new_idx; | |
679 | tmp_val = new_val; | |
680 | tmp_dmg = damage; | |
681 | } | |
682 | ||
683 | new_val++; | |
f55205f4 | 684 | } while (desc->min + desc->step * new_val <= desc->max); |
bd6ca2cf MH |
685 | |
686 | new_idx = tmp_idx; | |
687 | new_val = tmp_val; | |
688 | ||
6e0414a5 | 689 | if (max8997->ignore_gpiodvs_side_effect == false) |
bd6ca2cf MH |
690 | return -EINVAL; |
691 | ||
c4e3b144 JH |
692 | dev_warn(&rdev->dev, |
693 | "MAX8997 GPIO-DVS Side Effect Warning: GPIO SET: %d -> %d\n", | |
694 | max8997->buck125_gpioindex, tmp_idx); | |
bd6ca2cf MH |
695 | |
696 | out: | |
697 | if (new_idx < 0 || new_val < 0) | |
698 | return -EINVAL; | |
699 | ||
700 | max8997->buck125_gpioindex = new_idx; | |
701 | max8997_set_gpio(max8997); | |
702 | *selector = new_val; | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
bd6ca2cf | 707 | /* For SAFEOUT1 and SAFEOUT2 */ |
b79ca051 AL |
708 | static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev, |
709 | unsigned selector) | |
bd6ca2cf MH |
710 | { |
711 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
712 | struct i2c_client *i2c = max8997->iodev->i2c; | |
b3e1348e | 713 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 714 | int reg, shift = 0, mask, ret; |
bd6ca2cf MH |
715 | |
716 | if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2) | |
717 | return -EINVAL; | |
718 | ||
bd6ca2cf MH |
719 | ret = max8997_get_voltage_register(rdev, ®, &shift, &mask); |
720 | if (ret) | |
721 | return ret; | |
722 | ||
b79ca051 | 723 | return max8997_update_reg(i2c, reg, selector << shift, mask << shift); |
bd6ca2cf MH |
724 | } |
725 | ||
bd6ca2cf MH |
726 | static int max8997_reg_disable_suspend(struct regulator_dev *rdev) |
727 | { | |
728 | struct max8997_data *max8997 = rdev_get_drvdata(rdev); | |
729 | struct i2c_client *i2c = max8997->iodev->i2c; | |
730 | int ret, reg, mask, pattern; | |
b3e1348e | 731 | int rid = rdev_get_id(rdev); |
bd6ca2cf MH |
732 | |
733 | ret = max8997_get_enable_register(rdev, ®, &mask, &pattern); | |
734 | if (ret) | |
735 | return ret; | |
736 | ||
737 | max8997_read_reg(i2c, reg, &max8997->saved_states[rid]); | |
738 | ||
739 | if (rid == MAX8997_LDO1 || | |
740 | rid == MAX8997_LDO10 || | |
741 | rid == MAX8997_LDO21) { | |
742 | dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n", | |
743 | rdev->desc->name); | |
744 | return max8997_update_reg(i2c, reg, 0x40, mask); | |
745 | } | |
746 | ||
747 | dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n", | |
748 | rdev->desc->name, max8997->saved_states[rid] & mask, | |
749 | (~pattern) & mask); | |
750 | return max8997_update_reg(i2c, reg, ~pattern, mask); | |
751 | } | |
752 | ||
753 | static struct regulator_ops max8997_ldo_ops = { | |
754 | .list_voltage = max8997_list_voltage, | |
755 | .is_enabled = max8997_reg_is_enabled, | |
756 | .enable = max8997_reg_enable, | |
757 | .disable = max8997_reg_disable, | |
9e96b3a7 | 758 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 759 | .set_voltage = max8997_set_voltage_ldobuck, |
bd6ca2cf MH |
760 | .set_suspend_disable = max8997_reg_disable_suspend, |
761 | }; | |
762 | ||
763 | static struct regulator_ops max8997_buck_ops = { | |
764 | .list_voltage = max8997_list_voltage, | |
765 | .is_enabled = max8997_reg_is_enabled, | |
766 | .enable = max8997_reg_enable, | |
767 | .disable = max8997_reg_disable, | |
9e96b3a7 | 768 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf | 769 | .set_voltage = max8997_set_voltage_buck, |
24bd4109 | 770 | .set_voltage_time_sel = max8997_set_voltage_buck_time_sel, |
bd6ca2cf MH |
771 | .set_suspend_disable = max8997_reg_disable_suspend, |
772 | }; | |
773 | ||
774 | static struct regulator_ops max8997_fixedvolt_ops = { | |
775 | .list_voltage = max8997_list_voltage, | |
776 | .is_enabled = max8997_reg_is_enabled, | |
777 | .enable = max8997_reg_enable, | |
778 | .disable = max8997_reg_disable, | |
bd6ca2cf MH |
779 | .set_suspend_disable = max8997_reg_disable_suspend, |
780 | }; | |
781 | ||
782 | static struct regulator_ops max8997_safeout_ops = { | |
b79ca051 | 783 | .list_voltage = regulator_list_voltage_table, |
bd6ca2cf MH |
784 | .is_enabled = max8997_reg_is_enabled, |
785 | .enable = max8997_reg_enable, | |
786 | .disable = max8997_reg_disable, | |
9e96b3a7 | 787 | .get_voltage_sel = max8997_get_voltage_sel, |
b79ca051 | 788 | .set_voltage_sel = max8997_set_voltage_safeout_sel, |
bd6ca2cf MH |
789 | .set_suspend_disable = max8997_reg_disable_suspend, |
790 | }; | |
791 | ||
792 | static struct regulator_ops max8997_fixedstate_ops = { | |
793 | .list_voltage = max8997_list_voltage_charger_cv, | |
9e96b3a7 | 794 | .get_voltage_sel = max8997_get_voltage_sel, |
bd6ca2cf MH |
795 | .set_voltage = max8997_set_voltage_charger_cv, |
796 | }; | |
797 | ||
9e96b3a7 AL |
798 | static int max8997_set_current_limit(struct regulator_dev *rdev, |
799 | int min_uA, int max_uA) | |
bd6ca2cf MH |
800 | { |
801 | unsigned dummy; | |
9e96b3a7 | 802 | int rid = rdev_get_id(rdev); |
bd6ca2cf | 803 | |
9e96b3a7 AL |
804 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) |
805 | return -EINVAL; | |
bd6ca2cf | 806 | |
9e96b3a7 AL |
807 | /* Reuse max8997_set_voltage_ldobuck to set current_limit. */ |
808 | return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy); | |
bd6ca2cf MH |
809 | } |
810 | ||
9e96b3a7 AL |
811 | static int max8997_get_current_limit(struct regulator_dev *rdev) |
812 | { | |
813 | int sel, rid = rdev_get_id(rdev); | |
814 | ||
815 | if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF) | |
816 | return -EINVAL; | |
817 | ||
818 | sel = max8997_get_voltage_sel(rdev); | |
819 | if (sel < 0) | |
820 | return sel; | |
821 | ||
822 | /* Reuse max8997_list_voltage to get current_limit. */ | |
823 | return max8997_list_voltage(rdev, sel); | |
824 | } | |
bd6ca2cf MH |
825 | |
826 | static struct regulator_ops max8997_charger_ops = { | |
827 | .is_enabled = max8997_reg_is_enabled, | |
828 | .enable = max8997_reg_enable, | |
829 | .disable = max8997_reg_disable, | |
9e96b3a7 AL |
830 | .get_current_limit = max8997_get_current_limit, |
831 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
832 | }; |
833 | ||
834 | static struct regulator_ops max8997_charger_fixedstate_ops = { | |
9e96b3a7 AL |
835 | .get_current_limit = max8997_get_current_limit, |
836 | .set_current_limit = max8997_set_current_limit, | |
bd6ca2cf MH |
837 | }; |
838 | ||
4533f80e AL |
839 | #define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\ |
840 | .name = #_name, \ | |
841 | .id = MAX8997_##_name, \ | |
842 | .ops = &_ops, \ | |
bd6ca2cf MH |
843 | .type = REGULATOR_VOLTAGE, \ |
844 | .owner = THIS_MODULE, \ | |
845 | } | |
4533f80e AL |
846 | |
847 | #define MAX8997_CURRENT_REGULATOR(_name, _ops) {\ | |
848 | .name = #_name, \ | |
849 | .id = MAX8997_##_name, \ | |
850 | .ops = &_ops, \ | |
851 | .type = REGULATOR_CURRENT, \ | |
bd6ca2cf MH |
852 | .owner = THIS_MODULE, \ |
853 | } | |
854 | ||
855 | static struct regulator_desc regulators[] = { | |
4533f80e AL |
856 | MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops), |
857 | MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops), | |
858 | MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops), | |
859 | MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops), | |
860 | MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops), | |
861 | MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops), | |
862 | MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops), | |
863 | MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops), | |
864 | MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops), | |
865 | MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops), | |
866 | MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops), | |
867 | MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops), | |
868 | MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops), | |
869 | MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops), | |
870 | MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops), | |
871 | MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops), | |
872 | MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops), | |
873 | MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops), | |
874 | MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops), | |
875 | MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops), | |
876 | MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops), | |
877 | MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops), | |
878 | MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops), | |
879 | MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops), | |
880 | MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops), | |
881 | MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops), | |
882 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops), | |
883 | MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops), | |
884 | MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops), | |
885 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops), | |
886 | MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops), | |
887 | MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops), | |
888 | MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops), | |
889 | MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF, | |
890 | max8997_charger_fixedstate_ops), | |
bd6ca2cf MH |
891 | }; |
892 | ||
77b71b37 | 893 | #ifdef CONFIG_OF |
b4895e2c | 894 | static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev, |
77b71b37 TA |
895 | struct max8997_platform_data *pdata, |
896 | struct device_node *pmic_np) | |
897 | { | |
898 | int i, gpio; | |
899 | ||
900 | for (i = 0; i < 3; i++) { | |
901 | gpio = of_get_named_gpio(pmic_np, | |
902 | "max8997,pmic-buck125-dvs-gpios", i); | |
903 | if (!gpio_is_valid(gpio)) { | |
b4895e2c | 904 | dev_err(&pdev->dev, "invalid gpio[%d]: %d\n", i, gpio); |
77b71b37 TA |
905 | return -EINVAL; |
906 | } | |
907 | pdata->buck125_gpios[i] = gpio; | |
908 | } | |
909 | return 0; | |
910 | } | |
911 | ||
b4895e2c | 912 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
77b71b37 TA |
913 | struct max8997_platform_data *pdata) |
914 | { | |
b4895e2c | 915 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); |
77b71b37 TA |
916 | struct device_node *pmic_np, *regulators_np, *reg_np; |
917 | struct max8997_regulator_data *rdata; | |
918 | unsigned int i, dvs_voltage_nr = 1, ret; | |
919 | ||
b8b27a44 | 920 | pmic_np = iodev->dev->of_node; |
77b71b37 | 921 | if (!pmic_np) { |
b4895e2c | 922 | dev_err(&pdev->dev, "could not find pmic sub-node\n"); |
77b71b37 TA |
923 | return -ENODEV; |
924 | } | |
925 | ||
c0a35363 | 926 | regulators_np = of_get_child_by_name(pmic_np, "regulators"); |
77b71b37 | 927 | if (!regulators_np) { |
b4895e2c | 928 | dev_err(&pdev->dev, "could not find regulators sub-node\n"); |
77b71b37 TA |
929 | return -EINVAL; |
930 | } | |
931 | ||
932 | /* count the number of regulators to be supported in pmic */ | |
ee70b258 | 933 | pdata->num_regulators = of_get_child_count(regulators_np); |
77b71b37 | 934 | |
b4895e2c | 935 | rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * |
77b71b37 TA |
936 | pdata->num_regulators, GFP_KERNEL); |
937 | if (!rdata) { | |
c92f5dd2 | 938 | of_node_put(regulators_np); |
77b71b37 TA |
939 | return -ENOMEM; |
940 | } | |
941 | ||
942 | pdata->regulators = rdata; | |
943 | for_each_child_of_node(regulators_np, reg_np) { | |
944 | for (i = 0; i < ARRAY_SIZE(regulators); i++) | |
945 | if (!of_node_cmp(reg_np->name, regulators[i].name)) | |
946 | break; | |
947 | ||
948 | if (i == ARRAY_SIZE(regulators)) { | |
b4895e2c AL |
949 | dev_warn(&pdev->dev, "don't know how to configure regulator %s\n", |
950 | reg_np->name); | |
77b71b37 TA |
951 | continue; |
952 | } | |
953 | ||
954 | rdata->id = i; | |
b4895e2c | 955 | rdata->initdata = of_get_regulator_init_data(&pdev->dev, |
072e78b1 JMC |
956 | reg_np, |
957 | ®ulators[i]); | |
77b71b37 TA |
958 | rdata->reg_node = reg_np; |
959 | rdata++; | |
960 | } | |
c92f5dd2 | 961 | of_node_put(regulators_np); |
77b71b37 TA |
962 | |
963 | if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) | |
964 | pdata->buck1_gpiodvs = true; | |
965 | ||
966 | if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) | |
967 | pdata->buck2_gpiodvs = true; | |
968 | ||
969 | if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) | |
970 | pdata->buck5_gpiodvs = true; | |
971 | ||
972 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
973 | pdata->buck5_gpiodvs) { | |
b4895e2c | 974 | ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np); |
77b71b37 TA |
975 | if (ret) |
976 | return -EINVAL; | |
977 | ||
978 | if (of_property_read_u32(pmic_np, | |
979 | "max8997,pmic-buck125-default-dvs-idx", | |
980 | &pdata->buck125_default_idx)) { | |
981 | pdata->buck125_default_idx = 0; | |
982 | } else { | |
983 | if (pdata->buck125_default_idx >= 8) { | |
984 | pdata->buck125_default_idx = 0; | |
b4895e2c | 985 | dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n"); |
77b71b37 TA |
986 | } |
987 | } | |
988 | ||
989 | if (of_get_property(pmic_np, | |
990 | "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) | |
991 | pdata->ignore_gpiodvs_side_effect = true; | |
992 | ||
993 | dvs_voltage_nr = 8; | |
994 | } | |
995 | ||
996 | if (of_property_read_u32_array(pmic_np, | |
997 | "max8997,pmic-buck1-dvs-voltage", | |
998 | pdata->buck1_voltage, dvs_voltage_nr)) { | |
b4895e2c | 999 | dev_err(&pdev->dev, "buck1 voltages not specified\n"); |
77b71b37 TA |
1000 | return -EINVAL; |
1001 | } | |
1002 | ||
1003 | if (of_property_read_u32_array(pmic_np, | |
1004 | "max8997,pmic-buck2-dvs-voltage", | |
1005 | pdata->buck2_voltage, dvs_voltage_nr)) { | |
b4895e2c | 1006 | dev_err(&pdev->dev, "buck2 voltages not specified\n"); |
77b71b37 TA |
1007 | return -EINVAL; |
1008 | } | |
1009 | ||
1010 | if (of_property_read_u32_array(pmic_np, | |
1011 | "max8997,pmic-buck5-dvs-voltage", | |
1012 | pdata->buck5_voltage, dvs_voltage_nr)) { | |
b4895e2c | 1013 | dev_err(&pdev->dev, "buck5 voltages not specified\n"); |
77b71b37 TA |
1014 | return -EINVAL; |
1015 | } | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | #else | |
b4895e2c | 1020 | static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev, |
77b71b37 TA |
1021 | struct max8997_platform_data *pdata) |
1022 | { | |
1023 | return 0; | |
1024 | } | |
1025 | #endif /* CONFIG_OF */ | |
1026 | ||
a5023574 | 1027 | static int max8997_pmic_probe(struct platform_device *pdev) |
bd6ca2cf MH |
1028 | { |
1029 | struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); | |
77b71b37 | 1030 | struct max8997_platform_data *pdata = iodev->pdata; |
c172708d | 1031 | struct regulator_config config = { }; |
ad78bba4 | 1032 | struct regulator_dev *rdev; |
bd6ca2cf MH |
1033 | struct max8997_data *max8997; |
1034 | struct i2c_client *i2c; | |
ad78bba4 | 1035 | int i, ret, nr_dvs; |
bd6ca2cf MH |
1036 | u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; |
1037 | ||
a2f07305 AL |
1038 | if (!pdata) { |
1039 | dev_err(&pdev->dev, "No platform init data supplied.\n"); | |
bd6ca2cf MH |
1040 | return -ENODEV; |
1041 | } | |
1042 | ||
77b71b37 | 1043 | if (iodev->dev->of_node) { |
b4895e2c | 1044 | ret = max8997_pmic_dt_parse_pdata(pdev, pdata); |
77b71b37 TA |
1045 | if (ret) |
1046 | return ret; | |
1047 | } | |
1048 | ||
8ae5767b AL |
1049 | max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), |
1050 | GFP_KERNEL); | |
bd6ca2cf MH |
1051 | if (!max8997) |
1052 | return -ENOMEM; | |
1053 | ||
bd6ca2cf MH |
1054 | max8997->dev = &pdev->dev; |
1055 | max8997->iodev = iodev; | |
1056 | max8997->num_regulators = pdata->num_regulators; | |
1057 | platform_set_drvdata(pdev, max8997); | |
1058 | i2c = max8997->iodev->i2c; | |
1059 | ||
1060 | max8997->buck125_gpioindex = pdata->buck125_default_idx; | |
6e0414a5 MH |
1061 | max8997->buck1_gpiodvs = pdata->buck1_gpiodvs; |
1062 | max8997->buck2_gpiodvs = pdata->buck2_gpiodvs; | |
1063 | max8997->buck5_gpiodvs = pdata->buck5_gpiodvs; | |
1064 | memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); | |
1065 | max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; | |
bd6ca2cf | 1066 | |
068a8c82 TA |
1067 | nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || |
1068 | pdata->buck5_gpiodvs) ? 8 : 1; | |
1069 | ||
1070 | for (i = 0; i < nr_dvs; i++) { | |
bd6ca2cf MH |
1071 | max8997->buck1_vol[i] = ret = |
1072 | max8997_get_voltage_proper_val( | |
1073 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1074 | pdata->buck1_voltage[i], |
1075 | pdata->buck1_voltage[i] + | |
bd6ca2cf MH |
1076 | buck1245_voltage_map_desc.step); |
1077 | if (ret < 0) | |
4177f95b | 1078 | return ret; |
bd6ca2cf MH |
1079 | |
1080 | max8997->buck2_vol[i] = ret = | |
1081 | max8997_get_voltage_proper_val( | |
1082 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1083 | pdata->buck2_voltage[i], |
1084 | pdata->buck2_voltage[i] + | |
bd6ca2cf MH |
1085 | buck1245_voltage_map_desc.step); |
1086 | if (ret < 0) | |
4177f95b | 1087 | return ret; |
bd6ca2cf MH |
1088 | |
1089 | max8997->buck5_vol[i] = ret = | |
1090 | max8997_get_voltage_proper_val( | |
1091 | &buck1245_voltage_map_desc, | |
bc3b7756 AL |
1092 | pdata->buck5_voltage[i], |
1093 | pdata->buck5_voltage[i] + | |
bd6ca2cf MH |
1094 | buck1245_voltage_map_desc.step); |
1095 | if (ret < 0) | |
4177f95b | 1096 | return ret; |
bd6ca2cf MH |
1097 | |
1098 | if (max_buck1 < max8997->buck1_vol[i]) | |
1099 | max_buck1 = max8997->buck1_vol[i]; | |
1100 | if (max_buck2 < max8997->buck2_vol[i]) | |
1101 | max_buck2 = max8997->buck2_vol[i]; | |
1102 | if (max_buck5 < max8997->buck5_vol[i]) | |
1103 | max_buck5 = max8997->buck5_vol[i]; | |
1104 | } | |
1105 | ||
1106 | /* For the safety, set max voltage before setting up */ | |
1107 | for (i = 0; i < 8; i++) { | |
ecb9c4f5 | 1108 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
bd6ca2cf | 1109 | max_buck1, 0x3f); |
ecb9c4f5 | 1110 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, |
bd6ca2cf | 1111 | max_buck2, 0x3f); |
ecb9c4f5 | 1112 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, |
bd6ca2cf MH |
1113 | max_buck5, 0x3f); |
1114 | } | |
1115 | ||
11ec7bf0 | 1116 | /* Initialize all the DVS related BUCK registers */ |
068a8c82 | 1117 | for (i = 0; i < nr_dvs; i++) { |
11ec7bf0 TA |
1118 | max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, |
1119 | max8997->buck1_vol[i], | |
1120 | 0x3f); | |
1121 | max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, | |
1122 | max8997->buck2_vol[i], | |
1123 | 0x3f); | |
1124 | max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, | |
1125 | max8997->buck5_vol[i], | |
1126 | 0x3f); | |
1127 | } | |
1128 | ||
bd6ca2cf MH |
1129 | /* |
1130 | * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. | |
1131 | * If at least one of them cares, set gpios. | |
1132 | */ | |
1133 | if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || | |
1134 | pdata->buck5_gpiodvs) { | |
bd6ca2cf MH |
1135 | |
1136 | if (!gpio_is_valid(pdata->buck125_gpios[0]) || | |
1137 | !gpio_is_valid(pdata->buck125_gpios[1]) || | |
1138 | !gpio_is_valid(pdata->buck125_gpios[2])) { | |
1139 | dev_err(&pdev->dev, "GPIO NOT VALID\n"); | |
4177f95b | 1140 | return -EINVAL; |
bd6ca2cf MH |
1141 | } |
1142 | ||
8fa25eda AL |
1143 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0], |
1144 | "MAX8997 SET1"); | |
1145 | if (ret) | |
4177f95b | 1146 | return ret; |
8fa25eda AL |
1147 | |
1148 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1], | |
1149 | "MAX8997 SET2"); | |
1150 | if (ret) | |
4177f95b | 1151 | return ret; |
bd6ca2cf | 1152 | |
8fa25eda | 1153 | ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2], |
bd6ca2cf | 1154 | "MAX8997 SET3"); |
8fa25eda | 1155 | if (ret) |
4177f95b | 1156 | return ret; |
bd6ca2cf MH |
1157 | |
1158 | gpio_direction_output(pdata->buck125_gpios[0], | |
1159 | (max8997->buck125_gpioindex >> 2) | |
1160 | & 0x1); /* SET1 */ | |
1161 | gpio_direction_output(pdata->buck125_gpios[1], | |
1162 | (max8997->buck125_gpioindex >> 1) | |
1163 | & 0x1); /* SET2 */ | |
1164 | gpio_direction_output(pdata->buck125_gpios[2], | |
1165 | (max8997->buck125_gpioindex >> 0) | |
1166 | & 0x1); /* SET3 */ | |
bd6ca2cf MH |
1167 | } |
1168 | ||
1169 | /* DVS-GPIO disabled */ | |
1170 | max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ? | |
1171 | (1 << 1) : (0 << 1), 1 << 1); | |
1172 | max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ? | |
1173 | (1 << 1) : (0 << 1), 1 << 1); | |
1174 | max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? | |
1175 | (1 << 1) : (0 << 1), 1 << 1); | |
1176 | ||
dbb48e7c TB |
1177 | /* Misc Settings */ |
1178 | max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ | |
1179 | max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); | |
1180 | ||
bd6ca2cf MH |
1181 | for (i = 0; i < pdata->num_regulators; i++) { |
1182 | const struct voltage_map_desc *desc; | |
1183 | int id = pdata->regulators[i].id; | |
1184 | ||
1185 | desc = reg_voltage_map[id]; | |
b79ca051 | 1186 | if (desc) { |
bd6ca2cf MH |
1187 | regulators[id].n_voltages = |
1188 | (desc->max - desc->min) / desc->step + 1; | |
b79ca051 AL |
1189 | } else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) { |
1190 | regulators[id].volt_table = safeoutvolt; | |
1191 | regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt); | |
1192 | } else if (id == MAX8997_CHARGER_CV) { | |
bd6ca2cf | 1193 | regulators[id].n_voltages = 16; |
b79ca051 | 1194 | } |
bd6ca2cf | 1195 | |
c172708d MB |
1196 | config.dev = max8997->dev; |
1197 | config.init_data = pdata->regulators[i].initdata; | |
1198 | config.driver_data = max8997; | |
77b71b37 | 1199 | config.of_node = pdata->regulators[i].reg_node; |
c172708d | 1200 | |
ad78bba4 AL |
1201 | rdev = devm_regulator_register(&pdev->dev, ®ulators[id], |
1202 | &config); | |
1203 | if (IS_ERR(rdev)) { | |
bd6ca2cf MH |
1204 | dev_err(max8997->dev, "regulator init failed for %d\n", |
1205 | id); | |
ad78bba4 | 1206 | return PTR_ERR(rdev); |
bd6ca2cf MH |
1207 | } |
1208 | } | |
1209 | ||
bd6ca2cf | 1210 | return 0; |
bd6ca2cf MH |
1211 | } |
1212 | ||
1213 | static const struct platform_device_id max8997_pmic_id[] = { | |
1214 | { "max8997-pmic", 0}, | |
1215 | { }, | |
1216 | }; | |
a51b907b | 1217 | MODULE_DEVICE_TABLE(platform, max8997_pmic_id); |
bd6ca2cf MH |
1218 | |
1219 | static struct platform_driver max8997_pmic_driver = { | |
1220 | .driver = { | |
1221 | .name = "max8997-pmic", | |
bd6ca2cf MH |
1222 | }, |
1223 | .probe = max8997_pmic_probe, | |
bd6ca2cf MH |
1224 | .id_table = max8997_pmic_id, |
1225 | }; | |
1226 | ||
1227 | static int __init max8997_pmic_init(void) | |
1228 | { | |
1229 | return platform_driver_register(&max8997_pmic_driver); | |
1230 | } | |
1231 | subsys_initcall(max8997_pmic_init); | |
1232 | ||
1233 | static void __exit max8997_pmic_cleanup(void) | |
1234 | { | |
1235 | platform_driver_unregister(&max8997_pmic_driver); | |
1236 | } | |
1237 | module_exit(max8997_pmic_cleanup); | |
1238 | ||
1239 | MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver"); | |
1240 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); | |
1241 | MODULE_LICENSE("GPL"); |